DE3322967A1 - Device for tightening and releasing screwed connections - Google Patents

Abstract

The invention relates to a device for tightening and releasing screwed connections, that is, for example, nuts or screws, with an essentially annular spanner head which is arranged on one end of an arm which can be acted upon by torque at its other end, an annular insert part which is arranged in the spanner head, can be rotated relative to the spanner head and is to be connected in a positive-locking manner on the inside to a socket, nut, screw or the like, and a ratchet body which is to be moved from a working position into an overriding position against spring force and which, when the spanner head is rotated, produces a positive-locking connection between the spanner head and the insert body in the one (working) rotary position, whereas in the other (overriding) rotary position it is to be moved from its working position into an overriding position, the ratchet body being arranged in a recess, lying at the periphery of the insert part, of the housing essentially formed by the spanner head and the arm, the recess being larger than the ratchet body, and the ratchet body, on its side facing the insert part, being provided with a circular-arc-shaped curvature corresponding to the outside diameter of the insert part, which is provided with an external tooth system, and having a tooth system on this section, which tooth system corresponds to the tooth system of the insert part. <IMAGE>

Description

Mock-Gerätebau GmbH & Co. KG, Heinz-Kerneck-Str. 1, 2800 Bremen 44

Device for tightening and loosening screw connections

The invention relates to an invention for tightening and loosening screw connections, e.g. nuts or screws, with a substantially annular Wrench head which is arranged at one end of an arm which can be acted upon by a torque at its other end is, an annular insert part which is arranged in the key head and rotatable relative to the key head, which on seinex inside form-fit with a socket, nut, screw or the like. is to be connected and with a 'against spring force' from a working position latch body to be brought into a free-wheeling position.

512

Bremen Office '' Bremen Office:

i'i.stfach, POBoxlO7127
t loiliTiilh-i 32 D-2800 Bremen 1
Ti-leplum (04 21) * 34 9071
Tnekopii'rer / Telecopier CClTT2
'THegr. / Cables: diagram Bremen
Telex: 244 958 bopal d

Accounts / Account * Bremen;
Bremer Bank Bremen
(BLZ 29080010! 100144900
Deutsche Bank. Bremen
(BLZ. 290700 50) 1112002
Bank for community sheep. Munich
(BLZ 70010111) 17907 70200
PSchA Hamburg

Munich Office (patent attorneys only)

P.O. Box / PO Box 22 0137 Schl.01thauerstraße 3. D-8000 Munich Telephone: (089) 22 33 U
Telescope. / Telecop .: (089) 2215 69 CCITT Telegr. / Cables: Forbopat Munich. . Telex: 524 282 forbod

'' MFRT ....

■ when turning the wrench head in the one

(Working) direction of rotation a positive connection • establishes between the key head and the insert body, while in the other '(freewheeling) direction of rotation from his working position to a freewheeling position is to bring.

Such devices, also known for short as creaking,

ι: · lines are known in various configurations,

'■ i · - ■

"'■ where the key head is on with the usual ratchets

4, ·. its inside is provided with a toothing,

I. with which the each in a recess of the

? . ■ '·.' ■ Part of a sentence with equal division over the scope of the

j · 'insert part arranged in a distributed manner in the latch body

■ 4. . ; Application of a tightening or loosening torque

: j co-operate coherently while the latch body

-I. when turning in the freewheeling direction of rotation in each case against

j. the pressure of a spring '% "' ■ -. ·

". are to be pushed back into the insert body. These

Known ratchets are suitable with a certain design. for extremely high torques. They are 'however particular f. with refined, special configurations that I. partly consist of 60 or more components, extraordinary I ■ time-consuming and often so complicated that it depends on the ] User hardly serviced and certainly not repaired '

■ ":. Can be.. '

j ..; There are already so-called single-latch ratchets j. '■' - became known, but these too are both in terms of ; i ■ their construction as well as their mode of operation . '- very complicated, because with them it affects one

Pivot axis pivotably mounted pawl a piston. Cylinder unit, by means of which the pawl in working

BOEHMtKT _- & BOF.HMFKT ._

^: -ΌΌΟ 332236-7

position or is brought into free-running position. Because of this effort, the requirement of a pressure medium connection, bad handling etc. like one-pawl creaking. so far not particularly through- ·. can put, although there has long been a need for it exists, especially for applications in which not so high torques occur, relatively robust, to have simple and inexpensive ratchets available.

Accordingly, it is an object of the present invention based on a simple and accordingly inexpensive one-pawl ratchet to create that is simply structured and consists of only a few individual parts, so that. their Maintenance and even its repairs can generally be carried out by the users themselves.

As a solution to this problem is provided according to the invention, that the ratchet body.in one on the periphery of the insert part lying, chamber-shaped 'recess of the essentially is arranged by the key head and the arm formed housing, wherein the recess is slightly larger than the latch body, so that it is in the free-wheeling position has the ability to move back into the recess against the spring force, and that the latch body on its side facing the insert with a the outer diameter of the insert part provided with an external toothing corresponding to an arc of a circle Curvature is provided and has a toothing on this section, which is the toothing of the insert part is equivalent to. '.

Preferred embodiments of the present invention are described in the subclaims.

\\ (h "j - !. MHiLiSi l \ U \ HMHRi ...

_\:; ^ ^: '; - .3322987

The invention is based on an exemplary embodiment further explained with reference to a drawing. It shows: " .

1 shows a section through a device according to the invention . Device seen in the direction of the section line II-II in Fig. 2;

'. Fig. 2 is a plan view of the device according to

Fig. 1 in the direction of arrow II in

\. Fig. 1 in the working position of the latch body;

•. and

FIG. 3 shows a representation corresponding to FIG. 2

in the free-running position of the latch body.

The drawing shows a device for tightening and Loosening of screw connections with a substantially ring-shaped wrench head 1, which at one end of a is arranged in the drawing essentially broken away arm 2, the arm 2 at its in the drawing broken away other end is to be applied in a known manner with a torque (for example by means of a piston-cylinder unit). '

*. In the key head 1 is a on its inside with

f. A ring-shaped insert with a spline 3

part 4 arranged, which on a. Flange 6 of

ί ■ the key head. 1 and the arm 2 formed housing 7

rests and on its outer circumferential surface with an outer ■; . . 'gearing. 8 is provided .. The insert part 4 1st .relative. to the key head 1 rotatable about the axis 9-9. That .

'Insert part.4 can with its spline 3 on a

".;". socket or the like, not shown. be postponed

w) KH_vin _: ·; .. & HpLH _1

.- "" "■ j ^ LJ:": ■ * - "-> 332236?

-if

which in turn with a nut, screw or the like. can be engaged to attract them or to solve-. · '■

At the periphery of the insert part 4 is located in the housing a recess 11 for a latch body 12, which by means of an angle to the radial and at an angle to Spring 13 running tangential to insert part 4 in the recess 11 ■ is trimmed, instead of one of which is essentially radial and one is essentially tangential to the circumference of the insert part running double edera.nordnung could be provided.

The pawl body 12 is substantially in plan view triangular, although its shape is different from the. "Geometric triangular shape clearly deviates. Its the external toothing 8 of the insert 4 facing Page 14 is provided with a toothing 16 corresponding to the external toothing 8, which is in the working position meshes with the toothing 8. The other two outer triangular side surfaces 17 and 18 are wie.dieses from Figs. 2 and 3 can also be seen curved, the curved side 17 running towards the insert 4 at an acute angle, while the side 18 is approximately at right angles to the circumferential surface of the insert part 4 runs. The corners are rounded off. ·. '

As can be seen from FIGS. 2 and 3, the recess is 11 designed for the latch body 12 with similarly designed wall surfaces, with those of the outside 17 of the latch body 12 on page 19 has essentially the same curvature as the p. 17 of the latch body, while that of the p. 18 -

of the latch body 12 facing side 21 of the recess 11 , on which the spring 13 is supported, 'is essentially flat.

Of course, the longitudinal extension is the

• ■. Page 19 of the recess 11 longer than that associated with it

Nete outside 17 of the latch body so that

V this within the recess from its in Fig.

: .. shown working position in its in Fig. 3

shown free-wheeling position can move.

I If the arm 2 in the direction of the arrow 22 with a

^I I. When torque is applied, the teeth come into play. 16

\ of the pawl body 12 can be seen in FIG

: 'Way with the external teeth 8 of the insert. 4 in

; Engagement, the toothing 16 concentric to

Axis 9-9 is so that all teeth of the toothing 16 in engagement with teeth of the external toothing and a corresponding torque can be transmitted ». If, on the other hand, the arm moves in the direction of the

] . Arrow 23 (see Fig. 3) rotated, so the toothing ', 8 of the insert 4 presses the latch body 12 against the

Ί Effect of the spring 13 in its free-

* ■ ■

? running position so that the one at one end of the S. '

j. ■ lying outer teeth of the toothing 16 over the t ". External teeth 8 of the insert part 4 can ratchet and

a relative movement is possible.

1 ■ · ■

1 It can be seen that with the 'inventive

* 'direction an extremely simple, robust and yet · highly' \ .- ' effective device has been created from

Γ consists of less than ten individual parts and because of their

\ simple assembly is not only relatively inexpensive,

but also easy to maintain and repair, with

IU) BHM '^:;;:.& ROELLMERX. ---

\.:. ':. 1 ^ ;. " ^: O' ^: ". "- J 3322367

the device according to the invention despite the only one, multi-toothed ratchet body is able to generate relatively high torques within additional B ^ äfi · - ' to transfer charge limits. -

BOEHMK-RT & ΒΟΓΗΜΡ.ΠΤ

June 25, 1983

BSZUOCZSl CKSlSLI (LIST OP Ki ¹ FSKEKDE K

1 Key head Λ poor ? Splines (of 4) 4th Insert part l \ 5 - '· 5 6th Housing . - 6 ' 7th flange 7th 8th External gearing (of 4) ■ 8 9 axis ·· '9 10 - ίο 11 Recess (for 12) : 11 12th Latch body 12th 13th Feather · ■ i ^ 14th Page (of 12) ■ ·. ■ '· 14 1? - 15th 16 Toothing (of 12). 16 17th external surface (of 12) 17th 18th external surface (of 12) 18th 19th Page (of '11) 19th 20th _ '".: '20. 21 Page (of 11) 21 22nd Arrow ^: • '22 2? Arrow ' ' . "25 ' 24 · .24 25th ■ 25 Pf) '·. ■ - 26 27 '· 27 28 28 29 29 '■ 30th • 30

■ η-

Blank page

Claims (7)

BOhBMM.4 N- ^ T-HMHVf .--; June 25, 1983 Expectations Λ .J Device for tightening and loosening screw connections, for example nuts or screws, with an essentially ring-shaped wrench head which is arranged at one end of an arm that can be acted upon with a torque at its other end, one arranged in the wrench head, relative to the Key head rotatable, ring-shaped insert part, which is to be connected on its inside with a positive fit with a socket, nut, screw or the like. 5 and with one against spring force from a working position | · In. A pawl body to be brought into a free-wheeling position, "■ - · _ the one when turning the key head in one η. ■ . ■ · ■ -. ί ■ (working) direction of rotation a positive connection 1 'between the key head and the insert body '· While he is in the other (freewheeling) rotation . from his working position to freewheeling position is to be brought, characterized in that I. the pawl body (12) in one on the circumference of the-insert-5 partially (4) lying recess (11) of the essentially ζ '. from the key head. (1) and the arm (2) formed I housing (6) is arranged, wherein the recess (11) is larger than the latch body. (12); and that the pawl body (12) is attached to the insert part (4) 512 ROFHMHRT ·. ^:: .- ^;; ' ^: * "■ *" .- O 33229t? ^{reverse side (14) with a circular arc-shaped curvature tffet 1} - "corresponding to the outer diameter of the insert part (4) provided with an external toothing (8) and having a toothing (16) on this section, which corresponds to the toothing (8) of the insert part (4) corresponds to. ". 2. Apparatus according to claim 1, characterized in that the latch body (12) in the direction of the insert part axis (9-9) is essentially triangular, the two of which with the insert part (4) cooperating side (14.) outgoing. outer sides (.17, 18) also each curved are formed and at their rounded interface approximately at a right angle would cut. . 3. Apparatus according to claim 2, characterized in that said one outer side (17) Dej jack body (12) "part (4) extends to the periphery of the insert at an acute angle ^·.:. . ι ■■ "'■■■ 4. Device according to one or more of the preceding Claims, characterized in that the other outer side (18) of the latch body (12) the side (14) of the toothing (16) provided Latch body penetrated approximately at a right angle. 5. Device according to one or more of the preceding: preceding claims, characterized in that the The latch body (12) in the housing (6) with at least one Spring is supported, which extends at an angle to the tangential and the radial to the insert part (4). BC) KIlMEKT & HC) HHMLKI ]: ί --3-: S. "^ 3322567 6. Apparatus according to claim 5, characterized in that the latch body (12) is supported with two springs, one of which runs approximately tangentially and the other approximately radially to the insert part (4). 7. Device according to one or more of the previous. going claims, characterized in that the Wall surfaces - (19, .21) of the recess (11) for the latch body (12) have essentially the same curvature as the outer sides (17, 18) of the Latch body (12), the one at an acute angle on the insert part (4) tapering side (19) of the recess (11) has a greater extent than the side (.17) of the latch body (12) that interacts with it «